# Question

a. From the information given here determine the 95% confidence interval estimate of the population mean.

x̄ = 100 σ = 20 n = 25

b. Repeat part (a) with x = 200.

c. Repeat part (a) with x = 500.

d. Describe what happens to the width of the confidence interval estimate when the sample means increases.

x̄ = 100 σ = 20 n = 25

b. Repeat part (a) with x = 200.

c. Repeat part (a) with x = 500.

d. Describe what happens to the width of the confidence interval estimate when the sample means increases.

## Answer to relevant Questions

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